Sweep instead of dca.
So if I say I want $2k balance in my fiat account each day, the system can calc what the difference is at the same time each night and execute a Bitcoin transaction to produce that amount.
So if I peg my fiat balance at $2k and pay bills from my fiat and have a balance of $1k, overnight the system calcs I need to sell $1k of Bitcoin to go back to my peg. Alternatively if I get paid, excess would buy Bitcoin to go back to my fiat balance of $2k.